Lesson Plan | Technical Methodology | Electricity: Electric Potential

Objectives

Duration: 10 to 15 minutes

The purpose of this stage of the lesson plan is to ensure that students understand and apply the concept of electric potential in practical situations, relating it to other physical quantities. The development of these practical skills is essential for a direct connection to the job market, where problem-solving and the ability to apply theoretical knowledge in real contexts are highly valued.

Main Objectives

1. Understand the concept of electric potential and its relationship with the work done by the charge.

2. Calculate electric potential in practical situations.

3. Relate electric potential to other physical quantities, such as electric field.

Side Objectives

1. Develop problem-solving skills in real contexts.
2. Promote teamwork during experimental activities.

Introduction

Duration: 10 to 15 minutes

The purpose of this stage of the lesson plan is to ensure that students understand and apply the concept of electric potential in practical situations, relating it to other physical quantities. The development of these practical skills is essential for a direct connection to the job market, where problem-solving and the ability to apply theoretical knowledge in real contexts are highly valued.

Contextualization

Electric potential is a fundamental concept in Physics that is present in various situations in our daily lives, from the functioning of electronic devices we use to the electrical energy systems that power our homes and industries. Understanding how electric potential works is essential to grasp how electrical energy is manipulated and used in modern technologies.

Curiosities and Market Connection

💡 Curiosity: Did you know that the concept of electric potential was essential for the development of modern electricity? Without it, we wouldn't have inventions like the battery, which is crucial for the operation of portable devices like smartphones and laptops.

💼 Market Connection: In the job market, electrical and electronic engineers use electric potential to design circuits and energy systems. Industrial maintenance professionals also need to understand this concept to diagnose and solve problems in electrical machines and equipment.

Initial Activity

🔍 Initial Activity: Show a short video (3-4 minutes) that visually and dynamically explains what electric potential is and how it is applied in everyday devices, such as batteries and capacitors. After the video, ask a provocative question: How do you think electric potential influences the functioning of your smartphone?

Development

Duration: 40 to 45 minutes

The purpose of this stage of the lesson plan is to ensure that students understand both practically and theoretically the concept of electric potential, its relationship with work and the electric field, and how to calculate it in different situations. This stage aims to consolidate the knowledge acquired through interactive and challenging activities, promoting the application of concepts in real and relevant contexts for the job market.

Covered Topics

1. Concept of Electric Potential
2. Relation between Electric Potential and Work
3. Calculation of Electric Potential
4. Relation between Electric Potential and Electric Field

Reflections on the Theme

Guide students to reflect on the application of electric potential in everyday life. Ask how the concept of electric potential can be essential for the operation of electronic devices they use daily. Encourage them to think about the importance of understanding these concepts for future careers in technological and engineering fields.

Mini Challenge

Building a Homemade Capacitor

In this activity, students will build a homemade capacitor using simple materials. They will understand in practice how electric potential can be stored and used in electronic devices.

Instructions

1. Divide students into groups of 4 to 5 people.
2. Provide the following materials for each group: 2 aluminum plates, one plastic cup, adhesive tape, conductor wires, and a power source (9V battery).
3. Ask students to adhere one aluminum plate to the inside of the cup and the other to the outside using adhesive tape.
4. Explain that the aluminum plates will function as the terminals of the capacitor.
5. Connect the conductor wires to the aluminum plates and attach them to the battery for a few seconds to charge the capacitor.
6. Disconnect the battery and carefully bring the ends of the wires closer to observe the electric spark resulting from the capacitor's discharge.
7. Discuss with the students what happened during the experiment and relate it to the concept of electric potential and energy storage.

Objective: To practically demonstrate how electric potential can be stored and used, reinforcing theoretical understanding through a hands-on experience.

Duration: 30 to 35 minutes

Evaluation Exercises

1. Calculate the electric potential generated by a charge of 5C that does work of 10J.
2. Explain how electric potential is related to the electric field in a parallel plate configuration.
3. Solve the following problem: Two identical charges of 3C are separated by a distance of 2m. What is the electric potential at the midpoint between the two charges?

Conclusion

Duration: 10 to 15 minutes

The purpose of this stage of the lesson plan is to consolidate the knowledge acquired by the students, promoting reflection on their learning and its practical applications. The discussion and recap of the content aim to ensure that students understand the importance of electric potential in daily life and in their future careers, reinforcing the connection between theory, practice, and the job market.

Discussion

Facilitate an open discussion with students about the practical experiences carried out during the class. Ask how building the homemade capacitor helped them understand the concept of electric potential and its storage. Encourage students to reflect on how this knowledge can be applied in future technological and engineering careers. Question them about the challenges faced during the calculations and how they resolved the proposed problems. Ask them to share their impressions on the importance of electric potential in the functioning of everyday electronic devices.

Summary

Recap the main topics covered during the class: the concept of electric potential, its relationship with work and the electric field, and how to calculate it. Highlight the importance of understanding these concepts to solve practical problems and apply them in real contexts. Remind students of the practical activities carried out, such as the construction of the homemade capacitor and the fixation exercises, which reinforced the theory with concrete experiences.

Closing

Explain that the lesson connected theory with practice and applications by providing an integrated view of electric potential. Emphasize that understanding this concept is essential for various technological and engineering fields, highlighting its relevance in the job market. Conclude by stressing the importance of continuing to explore and apply this knowledge in everyday situations and future careers.